KR101862737B1 - Device-to-device communication method and user equipment - Google Patents

Abstract

The present invention discloses a D2D communication method and user equipment. Wherein the D2D communication method further comprises: the first user equipment determining a value of a scrambling code parameter, wherein the scrambling code parameter comprises at least one of a common scrambling code parameter and a specific scrambling code parameter; Scrambling bits to transmit according to a value of the scrambling code parameter; And transmitting the scrambled transmit bit by the first user equipment. According to the D2D communication method and the user equipment disclosed in the present invention, the transmission information is scrambled and descrambled in the D2D communication process, thereby enhancing the feasibility of the D2D communication scheme and improving the user experience.

Description

[0001] DEVICE-TO-DEVICE COMMUNICATION METHOD AND USER EQUIPMENT [0002]

Embodiments of the present invention relate to the field of communications, and more particularly to device-to-device communication methods and user equipment.

Device to Device Proximity Service (D2D Proximity Service) between User Equipment (UE) has become a hot issue on a Long Term Evolution (LTE) system. Currently, the functionality of Device to Device (D2D) communication is applied to some existing cluster systems and some walkie-talkie devices. Providing a D2D proximity service based on the physical layer of the LTE system, due to the jackpot in the commercialization of the LTE system, not only improves the service coverage of the LTE system but also allows more users to use the D2D communication.

Scrambling in an LTE system is classified into two main types, one of which is used to scramble the data channel as data channel scrambling and can implement interference randomization and user encryption, Is used for scrambling information to be transmitted after the CRC as a cyclic redundancy check (CRC) scrambling and can provide extra information implicitly to distinguish different users.

Up to now, there has been no scrambling scheme for D2D communication. Accordingly, in a process of performing D2D communication, a method of scrambling information to be transmitted at a transmit end and descrambling information received at a receive end is a problem to be solved urgently.

Embodiments of the present invention provide a D2D communication method and user equipment, whereby transmission information can be scrambled and descrambled in a D2D communication process.

According to one aspect, an embodiment of the present invention provides a D2D communication method. The D2D communication method comprising the steps of: a first user equipment determining a value of a scrambling code parameter, wherein the scrambling code parameter comprises a common scrambling code parameter and a specific scrambling code parameter a specific scrambling code parameter; Scrambling bits to be transmitted by the first user equipment according to the value of the scrambling code parameter; And transmitting the scrambled transmit bit by the first user equipment.

Referring to the first aspect, in a first possible implementation, the scrambling code parameter comprises the common scrambling code parameter, and the step of the first user equipment determining the value of the scrambling code parameter comprises: Determining a value of the common scrambling code parameter according to a D2D synchronization signal, determining a value of the common scrambling code parameter according to a primary D2D synchronization channel (PD2DSCH) Or the first user equipment determining the cluster identifier of the D2D cluster to which the first user equipment belongs as the value of the common scrambling code parameter.

Referring to a first possible implementation of the first aspect, in a second possible implementation, the step of the first user equipment determining the value of the common scrambling code parameter in accordance with the D2D synchronization signal comprises: And determining the number of the D2D synchronization signal as a value of the common scrambling code parameter.

Referring to a first possible implementation of the first aspect, in a third possible implementation, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal Wherein the step of the first user equipment determining the value of the common scrambling code parameter in accordance with the D2D synchronization signal comprises the step of determining the value of the common scrambling code parameter according to the PD2DSS and the SD2DSS of the first user equipment, .

은, With reference to a third possible implementation of the first aspect, in a fourth possible implementation, the value of the common scrambling code parameter

silver,

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 SD2DSS의 번호이고,

은 상기 PD2DSS의 번호이다.

Is the number of the SD2DSS,

Is the number of the PD2DSS.

With reference to the first aspect or with reference to the above described possible implementations of the first aspect, in a fifth possible implementation, the scrambling code parameter comprises the specific scrambling code parameter, and the first user equipment comprises a scrambling code parameter Determining a value of the first user equipment based on at least one identifier of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment And determining the value of the specific scrambling code parameter.

Referring to a fifth possible implementation of the first aspect, in a sixth possible implementation, the first user equipment comprises a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, Wherein determining the value of the specific scrambling code parameter in accordance with at least one identifier of a service type identifier of the equipment comprises determining the D2D identifier of the first user equipment as the value of the specific scrambling code parameter Wherein the first user equipment determines the D2D group identifier of the first user equipment as the value of the specific scrambling code parameter or the first user equipment identifies the service type identifier of the first user equipment as the specific scrambling code parameter, As a value of the code parameter.

Referring to a fifth possible implementation of the first aspect, in a seventh possible implementation, the first user equipment comprises a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, The step of determining the value of the specific scrambling code parameter according to at least one identifier of a service type identifier of the equipment may include determining a value of the specific scrambling code parameter based on a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, And determining the value of the particular scrambling code parameter according to the at least one identifier of the service type identifier of the first user equipment and a hash function or the value of the particular scrambling code parameter, The D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment. And determining the value of the specific scrambling code parameter according to an identifier and a truncate function.

Referring to the first aspect, in an eighth possible implementation, the step of the first user equipment determining the value of the scrambling code parameter comprises: determining whether the first user equipment is a base station, Receiving indication information transmitted by a cluster head of a D2D cluster, the indication information being used to indicate a value of the scrambling code parameter; And determining the value of the scrambling code parameter according to the indication information by the first user equipment.

In a ninth possible implementation, referring to the above described possible implementations of the first aspect or the first aspect, the step of scrambling bits to be transmitted by the first user equipment according to the value of the scrambling code parameter comprises: Wherein the user equipment determines a scrambling code initial value according to the value of the scrambling code parameter and the first user equipment generates a scrambling code sequence according to the scrambling code initial value, And scrambling the bits to be transmitted using the scrambling code sequence.

Referring to a ninth possible implementation of the first aspect, in a tenth possible implementation, the step of the first user equipment determining a scrambling code initial value according to the value of the scrambling code parameter comprises: Determining the value of the common scrambling code parameter as the scrambling code initial value, or the first user equipment determining the value of the specific scrambling code parameter as the scrambling code initial value.

Referring to a ninth possible implementation of the first aspect, in the eleventh possible implementation, the step of the first user equipment determining a scrambling code initial value according to the value of the scrambling code parameter comprises: And determining the scrambling code initial value according to a value of the scrambling code parameter and a current timeslot number.

은, Referring to an eleventh possible implementation of the first aspect, in a twelfth possible implementation, the scrambling code initial value

silver,

, 또는 Equation

, or

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값 또는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.

은, Referring to the eleventh possible implementation of the first aspect, in a thirteenth possible implementation, the scrambling code initial value

silver,

, 또는 Equation

, or

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값이며,

는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of the specific scrambling code parameter.

With reference to the first aspect or with reference to possible implementations of any of the first to eighth possible implementations of the first aspect, in a fourteenth possible implementation, Scrambling according to the value of the scrambling code parameter comprises the step of the first user equipment dividing the value of the scrambling code parameter into at least two scrambling code segments, And scrambling the bits to be transmitted using the scrambling code segments.

Referring to a fourteenth possible implementation of the first aspect, in a fifteenth possible implementation, the step of the first user equipment scrambling the bit to be transmitted using the at least two scrambling code segments comprises: The apparatus generates cyclic redundancy check (CRC) bits of the bits to be transmitted, and uses the bits to be transmitted and the CRC bits of the bits to be transmitted as bits to be scrambled; The first user equipment dividing the scrambled bits into at least two scrambled bit segments; The first user equipment generating a CRC bit of each scrambled bit segment in the at least two scrambled bit segments; And the first user equipment separately scrambling the CRC bits of the at least two scrambled bit segments using the at least two scrambling code segments.

Referring to a fourteenth possible implementation of the first aspect, in a sixteen possible implementation, the step of the first user equipment scrambling the bit to be transmitted using the at least two scrambling code segments comprises: The apparatus comprising: dividing the bits to be transmitted into at least two bit segments to be transmitted; The first user equipment generating a CRC bit of each bit segment to transmit in the at least two transmitted bit segments; And the first user equipment scrambling the CRC bits of the at least two bit segments to be transmitted separately using the at least two scrambling code segments.

According to a second aspect, an embodiment of the present invention provides yet another D2D communication method. The D2D communication method comprising: receiving a bit transmitted by a second user equipment by a first user equipment; The second user equipment determining a value of a scrambling code parameter of the first user equipment, the scrambling code parameter comprising at least one parameter of a common scrambling code parameter and a specific scrambling code parameter; And descrambling the received bits according to a value of the scrambling code parameter.

Referring to the second aspect, in a first possible implementation, the value of the common scrambling code parameter is determined by the first user equipment according to a D2D synchronization signal, or the value of the common scrambling code parameter is determined by a first D2D synchronization channel (PD2DSCH), or the value of the common scrambling code parameter is the cluster identifier of the D2D cluster to which the first user equipment belongs.

With reference to the second aspect or with reference to a first possible implementation of the second aspect, in a second possible implementation, the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, After the operation is performed using a predetermined function for at least one identifier of the user equipment's service type identifier, the value of the specific scrambling code parameter is obtained.

Referring to a second possible implementation of the second aspect, in a third possible implementation, the value of the specific scrambling code parameter is a D2D identifier of the first user equipment, or the value of the specific scrambling code parameter is a value The D2D group identifier of the device, or the value of the specific scrambling code parameter is the service type identifier of the first user equipment.

Referring to the second possible implementation of the second aspect, in a fourth possible implementation, the predetermined function is a hash function or a truncation function.

With reference to the second aspect or with reference to the above described possible implementations of the second aspect, in a fifth possible implementation, the step of the second user equipment determining the value of the scrambling code parameter of the first user equipment comprises: The second user equipment determining a value of the common scrambling code parameter in accordance with the D2D synchronization signal, the second user equipment determining a value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH) Or the second user equipment determines the cluster identifier of the D2D cluster to which the second user equipment belongs as the value of the common scrambling code parameter.

Referring to a fifth possible implementation of the second aspect, in a sixth possible implementation, the step of the second user equipment determining the value of the common scrambling code parameter in accordance with the D2D synchronization signal comprises: Determining a number of the D2D synchronization signal as a value of the common scrambling code parameter.

Referring to a fifth possible implementation of the second aspect, in a seventh possible implementation, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS) Wherein the step of the second user equipment determining the value of the common scrambling code parameter in accordance with the D2D synchronization signal comprises the step of the second user equipment determining the value of the common scrambling code parameter in accordance with the PD2DSS and the SD2DSS .

은, With reference to a seventh possible implementation of the second aspect, in an eighth possible implementation, the value of the common scrambling code parameter

silver,

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 SD2DSS의 번호이며,

는 상기 PD2DSS의 번호이다.

Is the number of the SD2DSS,

Is the number of the PD2DSS.

With reference to the second aspect or with reference to possible implementations of any of the first to fourth possible implementations of the second aspect, in a ninth possible implementation, the second user equipment is connected to the first user equipment Wherein the step of determining the value of the scrambling code parameter of the D2D cluster comprises receiving indication information transmitted by the second user equipment by the cluster head of the D2D cluster to which the base station or the second user equipment belongs, Used to indicate the value of the scrambling code parameter of the user equipment; And determining the value of the scrambling code parameter according to the indication information by the second user equipment.

With reference to the above described possible implementations of the second aspect or the second aspect, in a tenth possible implementation, the second user equipment descrambles the received bits according to the value of the scrambling code parameter, The second user equipment determining a scrambling code initial value according to the value of the scrambling code parameter and the second user equipment generating a scrambling code sequence according to the scrambling code initial value and using the scrambling code sequence And descrambling the received bits.

Referring to a tenth possible implementation of the second aspect, in the eleventh possible implementation, the step of the second user equipment determining a scrambling code initial value according to the value of the scrambling code parameter comprises: Determining the value of the common scrambling code parameter as the scrambling code initial value, or the second user equipment determining the value of the specific scrambling code parameter as the scrambling code initial value.

Referring to a tenth possible implementation of the second aspect, in a twelfth possible implementation, the step of the second user equipment determining a scrambling code initial value according to the value of the scrambling code parameter comprises: And determining the scrambling code initial value according to the value of the scrambling code parameter and the current time slot number.

은, Referring to a twelfth possible implementation of the second aspect, in a thirteenth possible implementation, the scrambling code initial value

silver,

, 또는 Equation

, or

을 이용하여 결정되고, Equation

, ≪ / RTI >

은 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값 또는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.

은, Referring to a twelfth possible implementation of the second aspect, in a fourteenth possible implementation, the scrambling code initial value

silver,

, 또는 Equation

, or

을 이용하여 결정되고, Equation

, ≪ / RTI >

은 상기 현재 타임슬롯 번호이며,

는 상기 공통 스크램블링 코드 파라미터의 값이고, 는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter, Is the value of the specific scrambling code parameter.

With reference to any one of the above described possible implementations of the second or the second aspect, in a fifteenth possible implementation, the bit received by the second user equipment comprises at least two bit segments, Wherein each bit segment in the two bit segments comprises a data bit segment and a CRC bit and wherein the second user equipment descrambles the received bits using the scrambling code sequence, Dividing the value of the scrambling code parameter into at least two scrambling code segments and the second user equipment separately descrambling the CRC bits of the at least two bit segments using the at least two scrambling code segments Obtaining at least two bit segments to be examined It includes.

Referring to a fifteenth possible implementation of the second aspect, in a sixteen possible implementation, the D2D communication method is characterized in that the second user equipment is operative to determine, for each bit segment to be examined in the at least two bit segments to be examined Performing a CRC check to obtain a data bit segment of each bit segment to be examined, and the second user equipment cascading a data bit segment of the at least two bit segments to be examined to generate a data bit The method comprising the steps of:

Referring to a sixteenth possible implementation of the second aspect, in a seventeenth possible implementation, the data bits comprise an original data bit and a CRC bit, and the D2D communication method further comprises: And performing a CRC check on the data bits to obtain the original data bits.

According to a third aspect, user equipment is provided. The user equipment comprising a determining module configured to determine a value of a scrambling code parameter, the scrambling code parameter including at least one of a common scrambling code parameter and a specific scrambling code parameter; A scrambling module configured to scramble bits to transmit according to the value of the scrambling code parameter, as determined by the decision module; And a sending module configured to transmit bits to be scrambled by the scrambling module.

Referring to the third aspect, in a first possible implementation, the scrambling code parameter comprises the common scrambling code parameter, and the decision module comprises a first decision unit, Wherein the first determination unit is configured to determine a value of the common scrambling code parameter according to a first D2D synchronization channel (PD2DSCH), or the first determination unit is configured to determine a value of the common scrambling code parameter And determine the cluster identifier of the D2D cluster to which the user equipment belongs as the value of the common scrambling code parameter.

With reference to a first possible implementation of the third aspect, in a second possible implementation, the first decision unit is specifically configured to determine the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Referring to a first possible implementation of the third aspect, in a third possible implementation, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS) The unit is specifically configured to determine the value of the common scrambling code parameter in accordance with the PD2DSS and the SD2DSS.

은, With reference to a third possible implementation of the third aspect, in a fourth possible implementation, the value of the common scrambling code parameter

silver,

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 SD2DSS의 번호이고,

는 상기 PD2DSS의 번호이다.

Is the number of the SD2DSS,

Is the number of the PD2DSS.

In a fifth possible implementation, with reference to the above described possible implementations of the third aspect or the third aspect, the scrambling code parameter comprises the specific scrambling code parameter, and the determining module determines the D2D identifier, And a second determination unit configured to determine the value of the specific scrambling code parameter according to at least one of a D2D group identifier of the user equipment and a service type identifier of the user equipment.

With reference to a fifth possible implementation of the third aspect, in a sixth possible implementation, the second decision unit specifically determines the D2D identifier of the user equipment as the value of the specific scrambling code parameter, To determine the D2D group identifier of the user equipment as the value of the specific scrambling code parameter, or to determine the service type identifier of the user equipment as the value of the specific scrambling code parameter.

With reference to a fifth possible implementation of the third aspect, in a seventh possible implementation, the second decision unit specifically specifies the D2D identifier of the user equipment, the D2D group identifier of the user equipment, and the service Determining the value of the specific scrambling code parameter according to the at least one identifier of the type identifier and the hash function or by determining the value of the D2D identifier of the user equipment, the D2D group identifier of the user equipment, and the service type identifier of the user equipment And determining the value of the particular scrambling code parameter according to the at least one identifier and the cutting function.

In a eighth possible implementation, with reference to the third aspect, the determination module comprises a receiving unit configured to receive indication information transmitted by a base station or a cluster head of a D2D cluster to which the user equipment belongs, Used to indicate the value of the code parameter -; And a third determination unit configured to determine a value of the scrambling code parameter in accordance with the instruction information received by the receiving unit.

In a ninth possible implementation, with reference to the above described possible implementations of the third or the third aspect, the scrambling module comprises a determination unit configured to determine a scrambling code initial value according to the value of the scrambling code parameter, And a first scrambling unit configured to generate a scrambling code sequence according to the scrambling code initial value determined by the determination unit, and to scramble the bit to be transmitted using the scrambling code sequence.

With reference to a ninth possible implementation of the third aspect, in a tenth possible implementation, the determination unit specifically determines the value of the common scrambling code parameter as the scrambling code initial value, As a scrambling code initial value.

With reference to a ninth possible implementation of the third aspect, in a twelfth possible implementation, the decision unit is specifically configured to determine the scrambling code initial value according to the value of the scrambling code parameter and the current time slot number .

Referring to the eleventh possible implementation of the third aspect, in a twelfth possible implementation, the determination unit is, in particular,

, 또는 Equation

, or

에 따라 상기 스크램블링 코드 초기값

을 결정하도록 구성되고, Equation

The scrambling code initial value

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값 또는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.

Referring to the eleventh possible implementation of the third aspect, in the thirteenth possible implementation, the determination unit is, in particular,

, 또는 Equation

, or

에 따라 상기 스크램블링 코드 초기값

을 결정하도록 구성되고, Equation

The scrambling code initial value

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값이며,

는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of the specific scrambling code parameter.

Referring to any possible implementation of any of the first to eighth possible implementations of the third or the third aspect, in a fourteenth possible implementation, the scrambling module is configured to convert the value of the scrambling code parameter to at least two And a second scrambling unit configured to scramble the bits to be transmitted using the at least two scrambling code segments divided by the segmentation unit, wherein the first scrambling code segment is a first scrambling code segment, .

Referring to a fourteenth possible implementation of the third aspect, in a fifteenth possible implementation, the second scrambling unit generates a cyclic redundancy check (CRC) bit of the bit to be transmitted, A first generation subunit configured to use the CRC bits of the bit as scrambled bits and a second generation subunit configured to divide the scrambled bits generated by the first generation subunit into at least two scrambled bit segments Wherein the first generation subunit further comprises a first segmentation subunit that is arranged in the at least two scrambled bit segments divided by the first segmentation subunit, Wherein the first scrambling sub-unit is configured to generate the at least two scrambling codes Segments of the at least two scrambled bit segments, generated by the first generating sub-unit, using the at least two scrambled bit segments.

Referring to a fourteenth possible implementation of the third aspect, in a sixteen possible implementation, the second scrambling unit comprises: a second segmentation sub-unit configured to divide the bit to be transmitted into at least two bit segments to be transmitted; A second generating sub-unit configured to generate a CRC bit of each bit segment to be transmitted in the at least two bit segments to be transmitted divided by the second segmentation sub-unit; And a second scrambling sub-unit configured to separately scramble the CRC bits of the at least two transmitted bit segments generated by the second generating sub-unit using the at least two scrambling code segments.

According to a fourth aspect, another user equipment is provided. The user equipment comprising: a receiving module configured to receive a bit transmitted by a first user equipment; A determination module configured to determine a value of a scrambling code parameter of the first user equipment, the scrambling code parameter comprising at least one parameter of a common scrambling code parameter and a specific scrambling code parameter; And a descrambling module configured to descramble the bits received by the receiving module according to the value of the scrambling code parameter determined by the determining module.

Referring to the fourth aspect, in a first possible implementation, the value of the common scrambling code parameter is determined by the first user equipment in accordance with a D2D synchronization signal, or the value of the common scrambling code parameter is determined by a first D2D synchronization channel (PD2DSCH), or the value of the common scrambling code parameter is the cluster identifier of the D2D cluster to which the first user equipment belongs.

With reference to a first possible implementation of the fourth or fourth aspect, in a second possible implementation, the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, After the operation is performed using a preset function for at least one identifier of the service type identifier, the value of the specific scrambling code parameter is obtained.

Referring to a second possible implementation of the fourth aspect, in a third possible implementation, the value of the specific scrambling code parameter is a D2D identifier of the first user equipment, The D2D group identifier of the device, or the value of the specific scrambling code parameter is the service type identifier of the first user equipment.

With reference to a second possible implementation of the fourth aspect, in a fourth possible implementation, the predetermined function is a hash function or a truncation function.

With reference to the above-described possible implementations of the fourth or fourth aspect, in a fifth possible implementation, the decision module comprises a first decision unit, wherein the first decision unit decides whether the common Wherein the first determination unit is configured to determine a value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH), or the first determination unit is configured to determine a value of the common scrambling code parameter As the value of the common scrambling code parameter, the cluster identifier of the D2D cluster to which the equipment belongs.

With reference to a fifth possible implementation of the fourth aspect, in a sixth possible implementation, the first decision unit is specifically configured to determine the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Referring to a fifth possible implementation of the fourth aspect, in a seventh possible implementation, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS) The unit is specifically configured to determine the value of the common scrambling code parameter in accordance with the PD2DSS and the SD2DSS.

은, With reference to a seventh possible implementation of the fourth aspect, in an eighth possible implementation, the value of the common scrambling code parameter

silver,

을 이용하여 결정되고, Equation

, ≪ / RTI >

는 상기 SD2DSS의 번호이며,

는 상기 PD2DSS의 번호이다

Is the number of the SD2DSS,

Is the number of the PD2DSS

Referring to any possible implementation of any of the above-described first through fourth possible implementations of the fourth or fourth aspect, in a ninth possible implementation, the decision module determines whether the base station or the D2D cluster A receiving unit configured to receive the indication information transmitted by the cluster head of the first user equipment, the indication information being used to indicate a value of a scrambling code parameter of the first user equipment; And a second determination unit configured to determine a value of the scrambling code parameter in accordance with the instruction information received by the receiving unit.

Referring to the above described possible implementations of the fourth or fourth aspect, in a tenth possible implementation, the descrambling module comprises a third determination unit configured to determine a scrambling code initial value according to the value of the scrambling code parameter, And a first descrambling unit configured to generate a scrambling code sequence according to the scrambling code initial value determined by the third determination unit and to descramble the received bits using the scrambling code sequence.

Referring to a tenth possible implementation of the fourth aspect, in the eleventh possible implementation, the third determination unit specifically determines the value of the common scrambling code parameter as the scrambling code initial value, And to determine the value of the code parameter as the scrambling code initial value.

Referring to a tenth possible implementation of the fourth aspect, in a twelfth possible implementation, the third determination unit specifically determines the scrambling code initial value according to the value of the scrambling code parameter and the current time slot number .

With reference to a twelfth possible implementation of the fourth aspect, in the thirteenth possible implementation, the third decision unit is, in particular,

, 또는 Equation

, or

에 따라 상기 스크램블링 코드 초기값

를 결정하도록 구성되고, Equation

The scrambling code initial value

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이고,

는 상기 공통 스크램블링 코드 파라미터의 값 또는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter or the value of the specific scrambling code parameter.

With reference to a twelfth possible implementation of the fourth aspect, in the fourteenth possible implementation, the third decision unit is, in particular,

, 또는 Equation

, or

에 따라 상기 스크램블링 코드 초기값

을 결정하도록 구성되고, Equation

The scrambling code initial value

, ≪ / RTI >

는 상기 현재 타임슬롯 번호이며,

는 상기 공통 스크램블링 코드 파라미터의 값이고,

는 상기 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of the specific scrambling code parameter.

With reference to any one of the above-described possible implementations of the fourth or fourth aspect, in a fifteenth possible implementation, the bit received by the receiving module comprises at least two bit segments, Wherein each bit segment in the bit segment comprises a data bit segment and a CRC bit, the descrambling module comprising: a segmentation unit configured to divide the value of the scrambling code parameter into at least two scrambling code segments; And a second descrambling unit configured to separately descramble the CRC bits of the at least two bit segments using the at least two scrambling code segments divided by the at least two scrambling code segments to obtain at least two bit segments to be examined.

Referring to a fifteenth possible implementation of the fourth aspect, in a sixteen possible implementation, the user equipment is configured to determine, for each of the at least two bit segments to be examined obtained by the second descrambling unit, A CRC check module configured to perform a CRC check on each of the bit segments to be examined to obtain a data bit segment of each bit segment to be examined, And a cascading module configured to cascade the data bit segment of the bit segment to be decoded.

Referring to a sixteenth possible implementation of the fourth aspect, in a seventeenth possible implementation, the data bits obtained by the cascading module comprise a source data bit and a CRC bit, And perform a CRC check on the data bits obtained by the cascading module to obtain the original data bits.

Based on the above-mentioned problem solving means, in accordance with the D2D communication method and the user equipment provided in the embodiment of the present invention, in order that transmission information can be scrambled in the D2D communication process, the transmitting end transmits a common scrambling code parameter or a specific scrambling code Determining a value of at least one scrambling code parameter of the parameters and scrambling bits to transmit according to the value of the scrambling code parameter; The receiving end determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter and descrambles the received bit according to the value of the scrambling code parameter thereby further enhancing the feasibility of the D2D communication scheme Thereby further enhancing the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly explain the problem solving means in the embodiment of the present invention, the following description briefly describes embodiments of the present invention or the accompanying drawings necessary for explaining the prior art. Obviously, in the following description, the appended drawings illustrate only certain embodiments of the invention and those skilled in the art will be able to dedicate other drawings from the attached drawings without creative effort.
1 is a schematic flow diagram of a D2D communication method according to an embodiment of the present invention.
2 is another schematic flow diagram of a D2D communication method according to an embodiment of the present invention.
3 is another schematic flow diagram of a D2D communication method according to an embodiment of the present invention.
4 is a schematic diagram illustrating scrambling bits to be transmitted in a D2D communication method according to an embodiment of the present invention.
5 is another schematic diagram showing scrambling bits to be transmitted in the D2D communication method according to an embodiment of the present invention.
6 is a schematic flow diagram of a D2D communication method according to another embodiment of the present invention.
7 is a schematic block diagram of a user equipment in accordance with an embodiment of the present invention.
8 is a schematic block diagram of a user equipment according to another embodiment of the present invention.
9 is a schematic block diagram of a user equipment according to another embodiment of the present invention.
10 is a schematic block diagram of a user equipment according to another embodiment of the present invention.

Hereinafter, technical solutions of embodiments of the present invention will be described in detail with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following embodiments are only a part of, but not all of the embodiments of the present invention. All other embodiments, which are obtained by those skilled in the art based on the embodiments of the present invention without any creative effort, are also within the scope of the present invention.

It should be understood that the tasks of the present invention are applicable to various communication systems, for example, Global System for Mobile communications (GSM), Code Division Multiple Access (CDMA) systems, A Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), an LTE system, an LTE-Advanced (Long Term Evolution) (Universal Mobile Telecommunication System, UMTS).

It should be understood that in the embodiment of the present invention, a user equipment (UE) is a mobile station (MS), a mobile terminal, a mobile telephone, a handset, Portable equipment, and the like. The user equipment can communicate with at least one core network by using a Radio Access Network (RAN). For example, the user equipment may be a mobile phone (also referred to as a " cellular " telephone) or a computer with wireless communication capability, or the user equipment may be a portable, pocket size, portable, .

In an embodiment of the present invention, the base station may be a base transceiver station (BTS) in GSM or CDMA, or may be a Node B in WCDMA, or may be a LTE base station (evolved Node B, eNB Or e-NodeB), which is not limited in the embodiment of the present invention.

1 shows a schematic flow diagram of a D2D communication method 100 according to an embodiment of the present invention. As shown in Figure 1, the D2D communication method 100 includes the following:

 S110. The first user equipment determines the value of a scrambling code parameter comprising at least one of a common scrambling code parameter and a specific scrambling code parameter.

S120. The first user equipment scrambles the bits to be transmitted according to the value of the scrambling code parameter.

S130. The first user equipment transmits a scrambled transmit bit.

Therefore, according to the D2D communication method in the present embodiment of the present invention, it is possible to transmit at least one of the common scrambling code parameter or the specific scrambling code parameter, such that the transmit end is scrambled in the D2D communication process, And scrambles the bits to be transmitted according to the value of the scrambling code parameter, thereby improving the feasibility of the D2D communication scheme and improving the user experience.

In this embodiment of the invention, the scrambling code parameter comprises a common scrambling code parameter and / or a specific scrambling code parameter such that the value of the scrambling code parameter is a value of a common scrambling code parameter and / And may include the value of a particular scrambling code parameter. The common scrambling code parameter may be a scrambling code parameter shared by a plurality of UEs and may reflect common characteristics of a plurality of user equipment, e.g., scrambling code parameters shared by all UEs in a D2D cluster. The particular scrambling code parameter may be a UE-specific scrambling code parameter and may reflect that the dedicated characteristics of the user equipment, e.g., the particular scrambling code parameter, are an identifier of the UE, ) Can distinguish a user equipment from another user equipment according to a particular scrambling code parameter. However, this embodiment of the present invention is not limited thereto.

For example, the first user equipment transmits a discovery signal. In some scenarios, such as ad scenarios, a first user equipment needs to be discovered by as many different user equipment as possible; Thus, the first user equipment may scramble the discovery signal by using a common scrambling code parameter, and the user equipment receiving the discovery signal may descramble the discovery signal by using a common scrambling code parameter. In some other scenarios, for example, if a first user equipment wants to be discovered only by a user equipment (e.g., a user equipment belonging to a friend group of a first user equipment) well known to the first user equipment, The user equipment that is able to descramble the discovery signal and transmit the discovery signal by using the code parameter and the user equipment receiving the discovery signal can descramble the discovery signal by using only the specific scrambling code parameter of the buddy group, User equipment can not descramble the discovery signal transmitted by the first user equipment because it does not know the specific scrambling code parameter of the group; Thus, user equipment that is not in a buddy group can not find the first user equipment.

The fact that the first user equipment determines the value of the scrambling code parameter at S110 includes that the first user equipment determines the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter. Here, the first user equipment may determine the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter in a plurality of ways. However, this embodiment of the present invention is not limited thereto.

In this embodiment of the invention, the bit to be transmitted may be specifically at least one bit, and the bit to be transmitted may have a discovery signal or data to be transmitted. However, this embodiment of the present invention is not limited thereto. Optionally, at S120, the first user equipment may perform data channel scrambling. Specifically, the first user equipment may generate a scrambling code sequence according to the value of the scrambling code parameter and may scramble the bits to be transmitted by using a scrambling code sequence. Optionally, in another embodiment, at S120, the first user equipment may also perform CRC scrambling. Specifically, the first user equipment may scramble the CRC bits of the bits to be transmitted using the value obtained after the value of the scrambling code parameter or the value of the scrambling code parameter is processed, as a scrambling code sequence. However, this embodiment of the present invention is not limited thereto.

When the bits to be transmitted in this embodiment of the invention have a discovery signal, this embodiment of the invention can be applied to an open discovery scenario and a controlled discovery scenario. In an open discovery scenario, a scrambling code parameter may include only a common scrambling code parameter so that a more adjacent UE may descramble the discovery signal transmitted by the first user equipment, and the discovery signal may include a common scrambling code parameter value Scrambled. In a controlled discovery scenario, the scrambling code parameter may include only a specific scrambling code parameter or may include a specific scrambling code parameter and a common scrambling code parameter, and the discovery signal may be generated according to the value of a particular scrambling code parameter, Value and the value of the common scrambling code parameter so that only adjacent user equipment that is more associated with the first user equipment can descramble the discovery signal transmitted by the first user equipment. Adjacent user equipment that is more relevant to the first user equipment may learn the value of the scrambling code parameter of the particular first user equipment. Here, the association is determined by the purpose for which the first user equipment transmits the discovery signal, i.e., the first user equipment determines which adjacent user equipment desires to descramble the discovery signal, for example, Adjacent user equipment is determined as the first user equipment, or adjacent user equipment belonging to the same service type as the first user equipment, which is not limited in this embodiment of the invention.

In this embodiment of the invention, if the scrambling code parameter includes a common scrambling code parameter, the first user equipment determines the value of the scrambling code parameter is the first user equipment determines the value of the common scrambling code parameter . Optionally, step S110 may be specifically implemented in the following manner:

Method 1: The first user equipment determines the value of the common scrambling code parameter according to the D2D synchronization signal.

Scheme 2: The first user equipment determines the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH).

Method 3: The first user equipment determines the cluster identifier of the D2D cluster to which the first user equipment belongs as the value of the common scrambling code parameter.

Specifically, in scheme 1, the first user equipment can detect the D2D synchronization signal. Here, the D2D synchronization signal may be transmitted by the cluster head of the D2D cluster to which the first user equipment belongs, or it may be transmitted by the base station, which is not limited in this embodiment of the invention. When detecting the D2D synchronization signal, the first user equipment obtains the value of the common scrambling code parameter from the D2D synchronization signal. Optionally, the first user equipment may use the number of the detected D2D synchronization signal as the value of the common scrambling code parameter, so that the first user equipment can, in particular, specify the number of the D2D synchronization signal as the common scrambling code parameter As a value.

Alternatively, in another embodiment, the D2D synchronization signal may comprise a Primary Device to Device Synchronization Signal (PD2DSS) and a Secondary Device to Device Synchronization Signal (SD2DSS) Method 1 may specifically be that the first user equipment determines the value of the common scrambling code parameter according to PD2DSS and SD2DSS.

을 아래의 수식에 따라 결정할 수 있다: The first user equipment can individually detect the PD2DSS and the SD2DSS and determine the value of the common scrambling code parameter according to the detected PD2DSS and SD2DSS. Optionally, the first user equipment may compare the value of the common scrambling code parameter

Can be determined according to the following formula:

는 SD2DSS의 번호이고,

은 PD2DSS의 번호이다. 선택적으로, 제1 사용자 장비는 또 다른 공식을 이용함으로써 공통 스크램블링 코드 파라미터의 값을 더 결정할 수 있으며, 이는 본 발명의 이 실시예에서 제한되지 않는다.

Is the number of the SD2DSS,

Is the PD2DSS number. Optionally, the first user equipment may further determine the value of the common scrambling code parameter by using another formula, which is not limited in this embodiment of the invention.

In scheme 2, the first user equipment may obtain the value of the common scrambling code parameter for a Primary Device to Device Synchronization Channel (PD2DSCH) of the D2D synchronization channel, which in this embodiment of the invention It is not limited.

In scheme 3, the first user equipment may use the cluster identifier of the D2D cluster to which the first user equipment belongs as the value of the common scrambling code parameter. However, this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, if the scrambling code parameter comprises a particular scrambling code parameter, the first user equipment determines the value of the scrambling code parameter is the first user equipment determines the value of the particular scrambling code parameter . The first user equipment may determine the specific scrambling code parameter of the first user equipment in a plurality of ways. In a preferred embodiment, the first user equipment is configured to receive a first user equipment identifier and a second user equipment identifier according to at least one of a D2D identifier of the first user equipment, a D2D group identifier of the first user equipment, The value of the scrambling code parameter may be determined, and thus step S110 may further be implemented in the following manner:

Method 4: The first user equipment determines the value of a specific scrambling code parameter according to at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment do.

Optionally, Scheme 4 may be specifically implemented in the following manner:

Method 1: The first user equipment uses the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment as the value of the specific scrambling code parameter.

The D2D group identifier of the first user equipment may be the D2D user group identifier of the first user equipment, but this embodiment of the invention is not so limited.

Method 2: The first user equipment performs an operation on at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment, The value obtained from the operation is used as the value of the specific scrambling code parameter.

Arithmetic rules can be represented by using functions such as a hash function or a truncate function. If the function is a cutting function, the cutting function is used to cut the identifier. Specifically, the cutting function can cut the identifier from the front end to the back end, cut the identifier from the back end to the front end, or cut the identifier from the middle, Is not limited in this embodiment.

It should be noted that the hash function included in this specification is also called a hash function.

Preferably, method 2 specifically uses the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment as the output value, To the hash function and using the output value of the hash function as the value of the specific scrambling code parameter; Or the first user equipment uses the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, or the service type identifier of the first user equipment as the output value, substitutes the output value into the cutting function, Lt; / RTI > as the value of a particular scrambling code parameter. However, this embodiment of the present invention is not limited thereto.

Alternatively, in another embodiment, if the D2D cluster to which the first user equipment belongs is centrally controlled by the base station, the first user equipment may also receive a value of a common scrambling code parameter and / or a specific scrambling code parameter of the first user equipment And can be determined according to the instruction information transmitted by the base station. However, if the D2D cluster to which the first user equipment belongs is controlled by the cluster head in a distributed manner, the first user equipment may also determine the value of the common scrambling code parameter and / or the specific scrambling code parameter of the first user equipment . Thus, step S110 may also be implemented in a fifth manner, and scheme 5 includes the following two steps:

Step 1: The first user equipment receives the indication information transmitted by the base station or the cluster head of the D2D cluster to which the first user equipment belongs. Here, the indication information is used to indicate the value of the scrambling code parameter.

Step 2: The first user equipment determines the value of the scrambling code parameter according to the indication information.

Specifically, the indication information may be physical layer signaling or higher layer signaling, for example, indication information may be discovery signal paging signaling or radio resource control (RRC) dedicated signaling. have. The indication information may indicate the value of the scrambling code parameter either explicitly or implicitly. Here, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter. For example, the indication information may comprise a value of a specific scrambling code parameter and / or a value of a common scrambling code parameter; Or instruction information comprises the value of a particular scrambling code parameter and / or the value of a common scrambling code parameter, and the first user equipment is operative to determine a value of a specific scrambling code parameter and / ≪ / RTI > However, this embodiment of the present invention is not limited thereto.

In this embodiment of the invention, the first user equipment may perform data channel scrambling on the bits to transmit. Thus, as shown in FIG. 2, the first user equipment scrambles bits to transmit in S120 according to the value of the scrambling code parameter, including:

S121. The first user equipment determines a scrambling code initial value according to the value of the scrambling code parameter.

S122. A first user equipment generates a scrambling code sequence according to the scrambling code initial value and scrambles the bits to be transmitted by using the scrambling code sequence.

Specifically, at step 122, the first user equipment generates the CRC bits of the bits to transmit, uses the bits to be transmitted and the CRC bits as actually transmitted bits, and then the first user equipment uses the scrambling code sequence Thereby actually descrambling the transmitted bits. However, this embodiment of the present invention is not limited thereto.

In this embodiment of the invention, the first user equipment may determine the scrambling code initial value in a plurality of ways. Preferably, step S121 may be implemented in the following implementation:

Implementation Method 1: If the scrambling code parameter includes a common scrambling code parameter, then the first user equipment determines the value of the common scrambling code parameter as the scrambling code initial value.

Implementation Method 2: If the scrambling code parameter includes a specific scrambling code parameter, the first user equipment determines the value of the specific scrambling code parameter as the scrambling code initial value.

Implementation Method 3: The first user equipment determines the scrambling code initial value and the current timeslot number according to the value of the scrambling code parameter.

은, 아래의 수식을 이용하여 결정될 수 있다: In Implementation 3, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter. The current time slot number may be the number of timeslots occupied when the first user equipment transmits a scrambled transmit bit. Optionally, the current timeslot number may be the number of timeslots in the radio frame occupied by the first user equipment, and the value of the current timeslot number may be any value between 0 and 19. However, this embodiment of the present invention is not limited thereto. Optionally, in Implementation 3, the scrambling code initial value

Can be determined using the following formula:

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

은 아래의 수식을 이용하여 결정될 수 있다: Optionally, in another embodiment, in Implementation 3, the scrambling code initial value

Can be determined using the following formula:

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Alternatively, in Implementation 3, the scrambling code initial value may additionally be determined using another formula, and this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, the first user equipment may further perform CRC scrambling on the bits to transmit. That is, the first user equipment scrambles the generated CRC bits according to the bits to be transmitted by using the value of the scrambling code parameter. Alternatively, in some specific situations, for example, if the number of bits corresponding to the value of the scrambling code parameter exceeds the number of CRC bits that need to be scrambled, i.e. the number of bits corresponding to the value of the scrambling code parameter If greater than 24, the first user equipment may divide the value of the scrambling code parameter into at least two scrambling code segments and scramble the bits to transmit by using at least two scrambling code segments. Here, the number of at least two scrambling code segments may be determined according to actual needs. For example, the number of bits of at least two scrambling code segments may be determined based on the number of bits corresponding to the value of the scrambling code parameter and the number of bits of the CRC bits, such that the number of bits corresponding to each scrambling code segment may be less than or equal to the number of CRC bits. It is determined by the quantity. However, this embodiment of the present invention is not limited thereto.

Optionally, as shown in FIG. 3, the first user equipment scrambles bits to transmit in S120 according to the value of the scrambling code parameter, including:

S123. The first user equipment divides the value of the scrambling code parameter into at least two scrambling code segments.

S124. The first user equipment scrambles bits to transmit by using at least two scrambling code segments.

Alternatively, at step 124, the first user equipment may generate at least two CRC bits for the bits to transmit and may use at least two scrambling code segments to scramble the generated CRC bits according to the bits to transmit . However, this embodiment of the present invention is not limited thereto.

Optionally, the first user equipment scrambles the bits to transmit by using at least two scrambling code segments in step 124, including:

S1241a. The first user equipment divides the bits to be transmitted into at least two bit segments to be transmitted.

S1242a. The first user equipment generates a cyclic redundancy check (CRC) bit of each bit segment to be transmitted in at least two bit segments to be transmitted.

S1243a. The first user equipment scrambles the CRC bits of at least two bit segments to be transmitted separately by using at least two scrambling code segments.

Specifically, the first user equipment generates a CRC bit for each bit segment to be transmitted in at least two bit segments to be transmitted, places the generated CRC bits in two corresponding bit segments to be transmitted, And the CRC bits as actually transmitted bit segments. Optionally, the number of bits segments to transmit may be equal to the number of scrambling code segments, and the first user equipment scrambles the CRC bits of at least two bit segments to be transmitted by using at least two scrambling code segments within a one- do. Optionally, the quantity of bits segments to be transmitted may also be greater than the quantity of scrambling code segments, in which case the first user equipment may use at least two scrambling code segments to transmit the CRC bits of some transmitted bit segments to at least two Scrambling the CRC bits of the other bit segments to be transmitted by scrambling in the bit segment to be transmitted and not scrambling the CRC bits of the other bit segments to be transmitted or by using segments filled with fixed values, To scramble the CRC bits of the other bit segments to be transmitted in at least two scrambling code segments. However, this embodiment of the present invention is not limited thereto.

4 is a schematic diagram illustrating a first user equipment performing CRC scrambling in accordance with an embodiment of the present invention. As shown in FIG. 4, the first user equipment divides bits (i.e., scrambling code bits) corresponding to the value of the scrambling code parameter into two scrambling code segments: a scrambling code segment 1 and a scrambling code segment 2. Accordingly, the first user equipment divides the bits to be transmitted into two bit segments to be transmitted: bit segment 1 to be transmitted and bit segment 2 to be transmitted, and the first user equipment transmits bit segment 1 to be transmitted and bit segment 2 to be transmitted And generates the CRC bits for each of them separately. The first user equipment then scrambles the CRC bit segment 1 of the bit to be transmitted by using the scrambling code segment 1 and scrambles the CRC bit segment 2 of the bit to be transmitted by using the scrambling code segment 2.

Optionally, in another embodiment, the first user equipment scrambles bits to transmit by using at least two scrambling code segments in step 124, including:

S1241b. The first user equipment generates the CRC bits of the bits to be transmitted and uses the bits to be transmitted and the CRC bits of the bits to be transmitted as bits to be scrambled.

S1242b. The first user equipment divides the bits to be scrambled into at least two scrambled bit segments.

S1243b. The first user equipment generates the CRC bits of each scrambled bit segment in at least two scrambled bit segments.

S1244b. The first user equipment scrambles the CRC bits of at least two scrambled bit segments separately by using at least two scrambling code segments.

Specifically, the first user equipment may place the CRC of the bits to be transmitted after the bits to be transmitted, and in this case, the bits to be transmitted and the CRC bits constitute bits to be scrambled together. The first user equipment then divides the bits to be scrambled into at least two scrambled bit segments; The first user equipment generates the CRC bits for each scrambled bit segment in at least two scrambled bit segments, arranges the generated CRC bits after the corresponding scrambled bit segment, scrambles the bit segment to be scrambled and the CRC bits It can be used as actually transmitted bit segment. Alternatively, the number of bit segments to be scrambled may be equal to the number of scrambling code segments, and the first user equipment may scramble the CRC bits of at least two scrambled bit segments by using at least two scrambling code segments within a one- do. Optionally, the quantity of bit segments to be scrambled may also be greater than the quantity of scrambling code segments, in which case the first user equipment may use at least two scrambling code segments to reduce the CRC bits of the bit segments to be scrambled by at least two Scrambling the CRC bits of the bit segments to be scrambled by scrambling in the bit segment to be scrambled and not scrambling the CRC bits of the other bit segments to be scrambled, or by using segments filled with fixed values, or by scrambling the at least one scrambling code segment By scrambling the CRC bits of the other bit segments to be scrambled in at least two scrambling code segments. However, this embodiment of the present invention is not limited thereto.

5 is a schematic diagram illustrating that a first user equipment in accordance with another embodiment of the present invention performs CRC scrambling. As shown in FIG. 5, the first user equipment divides bits (i.e., scrambling code bits) corresponding to the value of the scrambling code parameter into two scrambling code segments: scrambling code segment 1 and scrambling code segment 2. [ Meanwhile, the first user equipment generates a CRC bit of a bit to be transmitted, arranges a CRC bit after a bit to be transmitted, and constructs a bit to be scrambled. The first user equipment then divides the bits to be scrambled into two scrambled bit segments: scrambled bit segment 1 and scrambled bit segment 2, and the first user equipment scrambles bit segment 1 to be scrambled and bit segment 1 to be scrambled RTI ID = 0.0 > 2 < / RTI > The first user equipment then scrambles the CRC bits of the bit segment to be scrambled by using the scrambling code segment 1 and scrambles the CRC bit 2 of the bit segment to be scrambled by using the scrambling code segment 2. [

4 and 5, refinement is provided using an example where the number of scrambling code segments is two. Alternatively, in this embodiment of the invention, the quantity of scrambling code segments may also be other values, and the quantity of CRC bits that need to be scrambled may be equal to or different from the quantity of scrambling code segments, Is not limited in this embodiment.

It should be understood that the examples shown in FIGS. 4 and 5 are used to help those skilled in the art to better understand the embodiments of the present invention, but are not intended to limit the scope of protection of the embodiments of the present invention. Obviously, those skilled in the art can make various equivalent modifications or variations in accordance with the examples given in FIGS. 4 and 5, and such modifications or variations are also within the scope of protection of the embodiments of the present invention.

Therefore, according to the D2D communication method in the present embodiment of the present invention, the transmitting end determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be scrambled in the D2D communication process And scrambles the bits to be transmitted according to the value of the scrambling code parameter, thereby enhancing the feasibility of the D2D communication method and improving the user experience.

1 to 5, a D2D communication method according to an exemplary embodiment of the present invention has been described in detail from the point of view of a transmitting end. Hereinafter, a D2D communication method according to an exemplary embodiment of the present invention will be described with reference to FIG. Will be described in detail from the viewpoint of the receiving end.

6 is a schematic flow diagram illustrating a D2D communication method 200 in accordance with another embodiment of the present invention. As shown in Figure 6, the method 200 includes the following:

S210. The second user equipment receives the bits transmitted by the first user equipment.

S220. The second user equipment determines the value of the scrambling code parameter of the first user equipment, which includes at least one of a common scrambling code parameter and a specific scrambling code parameter.

S230. The second user equipment descrambles the received bits according to the value of the scrambling code parameter.

Therefore, according to the D2D communication method in the present embodiment of the present invention, the receiving end can calculate the value of at least one of the common scrambling code parameter And descrambles the received bits according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

Optionally, if the scrambling code parameter comprises a common scrambling code parameter, the value of the common scrambling code parameter is determined by the first user equipment in accordance with the D2D synchronization signal;

The value of the common scrambling code parameter is determined by the first user equipment in accordance with the primary D2D synchronization channel (PD2DSCH); or

The value of the common scrambling code parameter is the cluster identifier of the D2D cluster to which the first user equipment belongs.

Optionally, in another embodiment, if the scrambling code parameter comprises a specific scrambling code parameter, at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment After the operation is performed using the function for the identifier, the value of the specific scrambling code parameter is obtained.

Optionally, the function may be f (x) = x, i.e. the output value of the function may be the same as the input value of the function; Thus, the value of a particular scrambling code parameter may be the D2D identifier of the first user equipment,

The value of the particular scrambling code parameter is the D2D group identifier of the first user equipment, or

The value of the particular scrambling code parameter is the service type identifier of the first user equipment.

Optionally, in another embodiment, the function is a hash function or a truncation function.

In this embodiment of the invention, the second user equipment and the first user equipment may belong to the same D2D cluster; In such a case, the second user equipment may obtain the value of the scrambling code parameter of the first user equipment in a plurality of ways. Optionally, the second user equipment may determine the value of the scrambling code parameter of the first user equipment by using the indication information transmitted by the control unit. Specifically, if the D2D cluster is centrally controlled by the base station, the second user equipment can obtain the value of the scrambling code parameter by using the indication information of the base station; If the D2D cluster is controlled by the cluster head in a distributed manner, the second user equipment can obtain the value of the scrambling code parameter from the indication information transmitted by the cluster head of the D2D cluster. However, this embodiment of the present invention is not limited thereto.

Alternatively, in an embodiment, in some specific scenarios, for example, in scenarios where the second user equipment and the first user equipment belong to the same D2D cluster, if each user equipment in the D2D cluster scrambles and descrambles, The manner of determining the value of the parameter may also be predetermined and the second user equipment may determine the value of the scrambling code parameter in the same manner as the first user equipment, e.g., when the first user equipment performs scrambling If the value of the common scrambling code parameter is determined according to the D2D synchronization signal, the second user equipment can also determine the value of the common scrambling code parameter according to the D2D synchronization signal when performing the descrambling. Optionally, if the scrambling code parameter includes a common scrambling code parameter, step S220 may be implemented in the following manner, specifically:

Method 1: The second user equipment determines the value of the common scrambling code parameter according to the D2D synchronization signal.

Scheme 2: The first user equipment determines the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH).

Method 3: The second user equipment determines the cluster identifier of the D2D cluster to which the second user equipment belongs as the value of the common scrambling code parameter.

Optionally, Scheme 1 may specifically be that the second user equipment determines the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Optionally, in another embodiment, the D2D synchronization signal may comprise a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS), so that also in scheme 1, And determine the value of the common scrambling code parameter according to SD2DSS.

은 아래의 수식을 이용하여 결정된다: In a preferred embodiment, the value of the common scrambling code parameter

Is determined using the following formula:

는 SD2DSS의 번호이고,

은 PD2DSS의 번호이다.

Is the number of the SD2DSS,

Is the PD2DSS number.

Optionally, in another embodiment, the D2D cluster to which the second user equipment belongs may also be different from the D2D cluster to which the first user equipment belongs; In this case, if the base station providing the service to the first user equipment is the same as the base station serving the second user equipment, the second user equipment determines the value of the scrambling code parameter by using the indication information transmitted by the base station . However, this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, determining that the second user equipment determines the value of the scrambling code parameter of the first user equipment at S220 comprises:

S221. The second user equipment receives the indication information transmitted by the cluster head of the D2D cluster to which the base station or the second user equipment belongs. Here, the indication information is used to indicate the value of the scrambling code parameter of the first user equipment.

S222. The second user equipment determines the value of the scrambling code parameter according to the indication information.

The indication information may indicate the value of the scrambling code parameter explicitly or implicitly and the second user equipment may determine the value of the scrambling code parameter according to the indication information. Here, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter. However, this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, data channel scrambling or CRC scrambling may be used when the first user equipment scrambles the bits to transmit, and data channel descrambling or CRC if the second user equipment descrambles the received bits. Descrambling may also be used correspondingly. Optionally, if the second user equipment performs data channel descrambling on the received bits, the second user equipment descrambles the received bits according to the value of the scrambling code parameter in S230, including:

S231. The second user equipment determines the scrambling code initial value according to the value of the scrambling code parameter.

S232. The second user equipment generates a scrambling code sequence according to the scrambling code initial value and descrambles the received bits by using the scrambling code sequence.

Optionally, step S231 may be implemented in the following implementations:

Implementation Method 1: The second user equipment determines the value of the common scrambling code parameter as the scrambling code initial value.

Implementation Method 2: The second user equipment determines the value of the specific scrambling code parameter as the scrambling code initial value.

Implementation Method 3: The second user equipment determines the scrambling code initial value according to the value of the scrambling code parameter and the current time slot number.

아래의 수식을 이용하여 결정될 수 있다: In Implementation 3, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter, and the current time slot number is the time slot number occupied when the second user equipment receives the bit Lt; / RTI > Here, a timeslot receiving a bit by a second user equipment is the same as a timeslot transmitting a bit by a first user equipment, but this embodiment of the invention is not so limited. Optionally, in Implementation 3, the scrambling code initial value

It can be determined using the following formula:

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

아래의 수식을 이용하여 결정될 수 있다: Optionally, in another embodiment, in Implementation 3, the scrambling code initial value

It can be determined using the following formula:

, 또는

, or

은 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Alternatively, in Implementation 3, the scrambling code initial value may additionally be determined using another formula, and this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, the second user equipment may also perform CRC descrambling on the received bits. Alternatively, in some specific situations, for example, if the number of bits corresponding to the value of the scrambling code parameter exceeds the number of CRC bits that need to be descrambled, i.e., the number of bits corresponding to the value of the scrambling code parameter If the number is greater than 24, the first user equipment divides the value of the scrambling code parameter into a plurality of scrambling code segments to perform scrambling; Thus, the second user equipment may also divide the value of the scrambling code parameter into a plurality of scrambling code segments, and descramble the received bits by using a plurality of scrambling code segments.

Optionally, the bits received by the second user equipment comprise at least two bit segments to be descrambled, and each descrambled bit segment in the at least two descrambled bit segments comprises a data bit segment and a CRC bit do.

Thus, the second user equipment descrambles the received bits by using the scrambling code sequence at S230 includes:

S233. The second user equipment divides the value of the scrambling code parameter into at least two scrambling code segments.

S234. The second user equipment descrambles the CRC bits of the at least two descrambled bit segments individually by using at least two scrambling code segments to obtain at least two bit segments to be examined.

When the first user equipment performs scrambling in the manner shown in FIG. 4 or 6, the second user equipment can divide the value of the scrambling code parameter into two scrambling code segments, scrambling code segment 1 and scrambling code segment 2 And correspondingly divides the received bit into two bit segments, bit segment 1 and bit segment 2. The second user equipment then descrambles bit segment 1 by using scrambling code segment 1 to obtain bit segment 1 to be examined and descrambles bit segment 2 by using scrambling code segment 2 to determine which bit segment 2 < / RTI > Referring to FIG. 4, bit segment 1 to be checked corresponds to bit segment 1 to be transmitted and CRC bit segment 1 of a bit to be transmitted, bit segment 2 to be checked corresponds to bit segment 2 to be transmitted and CRC bit segment 2 As shown in Fig. Here, the bit segment to be transmitted is a data bit segment. 6, the bit segment 1 to be checked corresponds to the bit segment 1 to be scrambled and the CRC bit segment 1 of the bit to be transmitted, the bit segment 2 to be checked corresponds to the bit segment 2 to be scrambled and the CRC bit segment 2 As shown in Fig. However, this embodiment of the present invention is not limited thereto.

Optionally, in another embodiment, the D2D communication method 200 further comprises:

S240. The second user equipment performs a CRC check on each bit segment to be examined in at least two bit segments to be examined to obtain a data bit segment of each bit segment to be examined.

S250. The second user equipment cascades the data bit segments of at least two bit segments to be examined to obtain data bits.

Specifically, if the first user equipment performs scrambling in the manner shown in FIG. 4, the second user equipment performs a CRC check individually on the bit segment 1 to be checked and the bit segment to be examined, And acquires bit segment 2 to be transmitted. The second user equipment then caches the bit segment 1 to transmit and the bit segment 2 to transmit so that the bits to transmit of the first user equipment can be obtained. Here, the data to be transmitted is a data bit, in which case the data bits are the original data bits of the first user equipment.

Alternatively, in another embodiment, if the first user equipment performs scrambling in the manner shown in FIG. 6, the second user equipment performs CRC checking separately for bit segment 1 and bit segment 2 to be examined To obtain bit segment 1 to be scrambled and bit segment 2 to be scrambled. The second user equipment then cascades the bit segment 1 to be scrambled and bit segment 2 to be scrambled to obtain the scrambled bits of the first user equipment. Here, the bits to be scrambled include the bits to be transmitted and the CRC bits, the bits to be transmitted are data bits, and the second user equipment performs a CRC check to obtain the bits to be transmitted, i.e., the original data bits, You need to do it again.

Optionally, in another embodiment, the data bits include the original data bits and the CRC bits, and thus the D2D communication method 200 further comprises:

S260. The second user equipment performs a CRC check on the data bits to obtain the original data bits.

Therefore, according to the D2D communication method in the present embodiment of the present invention, the receiving end can calculate the value of at least one of the common scrambling code parameter And descrambles the received bits according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

It should be understood that the sequence number of the process described above does not imply an execution sequence. The execution sequence of the process should be determined according to the internal logic of the function and the process, and will not impose any limitation on the implementation process of the embodiment of the present invention.

An embodiment of the D2D communication method according to the present invention has been described in detail with reference to Figs. 1 to 6, and user equipment according to an embodiment of the present invention will be described below with reference to Figs. 7 to 10. Fig.

FIG. 7 shows a schematic block diagram of a user equipment 300 in accordance with an embodiment of the present invention. As shown in FIG. 7,

A determination module (310) configured to determine a value of a scrambling code parameter, the scrambling code parameter including at least one parameter of a common scrambling code parameter and a specific scrambling code parameter;

A scrambling module (320) configured to scramble bits to transmit according to the value of the scrambling code parameter, as determined by the decision module (310); And

And a transmitting module 330 configured to transmit the bits to be scrambled by the scrambling module 320. [

Thus, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be scrambled in the D2D communication process, and the scrambling code parameter Scrambles the bits to be transmitted in accordance with the value of " 0 ", thereby enhancing the feasibility of the communication method and improving the user experience.

Optionally, the scrambling code parameter includes a common scrambling code parameter, and accordingly the determination module 310 includes a first decision unit 311. [

Here, the first determination unit 311 determines the value of the common scrambling code parameter according to the D2D synchronization signal,

The first determination unit 311 determines the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH)

The first determination unit 311 is configured to determine the cluster identifier of the D2D cluster to which the user equipment 300 belongs as the value of the common scrambling code parameter.

Alternatively, in another embodiment, the first decision unit 311 is specifically configured to determine the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Alternatively, in another embodiment, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS)

Thus, the first determination unit 311 is specifically configured to determine the value of the common scrambling code parameter according to PD2DSS and SD2DSS.

은 아래의 수식을 이용하여 결정된다: Optionally, in another embodiment, the value of the common scrambling code parameter

Is determined using the following formula:

는 SD2DSS의 번호이고,

은 PD2DSS의 번호이다. here,

Is the number of the SD2DSS,

Is the PD2DSS number.

Optionally, in another embodiment, the scrambling code parameter includes a specific scrambling code parameter,

A second determination unit configured to determine a value of a specific scrambling code parameter according to at least one identifier of the user equipment 300, the D2D identifier of the user equipment 300, the D2D group identifier of the user equipment 300, 312).

Alternatively, in another embodiment, the second determination unit 312 may be,

Determine the D2D identifier of the user equipment 300 as the value of a particular scrambling code parameter,

Determine the D2D group identifier of the user equipment 300 as the value of a particular scrambling code parameter, or

And to determine the service type identifier of the user equipment 300 as the value of the specific scrambling code parameter.

Alternatively, in another embodiment, the second determination unit 312 may be,

Determining the value of a particular scrambling code parameter according to at least one of a D2D identifier of the user equipment 300, a D2D group identifier of the user equipment 300, a service type identifier of the user equipment 300, and a hash function,

Is configured to determine the value of a particular scrambling code parameter according to at least one of a D2D identifier of the user equipment (300), a D2D group identifier of the user equipment (300), a service type identifier of the user equipment (300), and a truncation function.

Optionally, in another embodiment, the determination module 310 may determine,

A receiving unit (313) configured to receive indication information transmitted by a cluster head of a D2D cluster to which the base station or user equipment (300) belongs; - indication information used to indicate a value of a scrambling code parameter; And

And a third determination unit 314 configured to determine the value of the scrambling code parameter in accordance with the instruction information received by the receiving unit 313. [

Optionally, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter.

Alternatively, in another embodiment, the scrambling module 320 may be configured to < RTI ID =

A determination unit (321) configured to determine a scrambling code initial value according to the value of the scrambling code parameter, as determined by the decision module (310); And

And a first scrambling unit 322 configured to generate a scrambling code sequence according to the scrambling code initial value determined by the determination unit 321 and to scramble the bits to be transmitted by using the scrambling code sequence.

Alternatively, in another embodiment, the determination unit 321 may be,

Determining the value of the common scrambling code parameter as the scrambling code initial value, or

And to determine the value of the specific scrambling code parameter as the scrambling code initial value.

Optionally, in another embodiment, the determination unit 321 is configured to determine a scrambling code initial value in accordance with the value of the scrambling code parameter, which is determined in detail by the determination module 310 and the current time slot number.

을 결정하도록 구성된다. Optionally, in another embodiment, the determination unit 321 specifically determines the scrambling code initial value < RTI ID = 0.0 >

.

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

을 결정하도록 구성된다: Optionally, in another embodiment, the determination unit 321 specifically determines the scrambling code initial value < RTI ID = 0.0 >

Lt; / RTI >

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Alternatively, in another embodiment, the scrambling module 320 may be configured to < RTI ID =

A segmentation unit (323) configured to divide the value of the scrambling code parameter into at least two scrambling code segments, as determined by the decision module (310); And

And a second scrambling unit (324) configured to scramble the bits to be transmitted by using at least two scrambling code segments divided by the segmentation unit (323).

Alternatively, in another embodiment, the second scrambling unit 324 may include

A first generating subunit (324a) configured to generate a cyclic redundancy check (CRC) bit of a bit to be transmitted, and to use a CRC bit of a bit to be transmitted and a bit to be scrambled as a bit to be scrambled;

A first segmentation subunit 324b configured to divide the scrambled bits generated by the first generation subunit 324a into at least two scrambled bit segments,

A first scrambling sub-unit configured to individually scramble the CRC bits of at least two scrambled bit segments generated by the first generating sub-unit 324a by using at least two scrambling code segments,

The first generation sub-unit 324a is further configured to generate the CRC bits of each scrambled bit segment in at least two scrambled bit segments divided by the first segmentation sub-unit 324b.

Alternatively, in another embodiment, the second scrambling unit 324 may include

A second segmentation subunit (324d) configured to divide the bits to be transmitted into at least two bit segments to be transmitted;

A second generating subunit 324e configured to generate a CRC bit of each bit segment to be transmitted in at least two bit segments to be transmitted segmented by the second segmentation subunit 324d; And

A second scrambling sub-unit 324f configured to separately scramble the CRC bits of at least two transmitted bit segments generated by the second generating sub-unit 324e by using at least two scrambling code segments .

The user equipment 300 according to this embodiment of the present invention may correspond to the first user equipment in the D2D communication method according to an embodiment of the present invention and may be a user equipment 300 described above and / And other operations and / or functions are intended to implement corresponding procedures. For the sake of brevity, details are not described herein.

Thus, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be scrambled in the D2D communication process, and the scrambling code parameter Scrambles the bits to be transmitted in accordance with the value of " 0 ", thereby enhancing the feasibility of the communication method and improving the user experience.

Figure 8 shows a schematic block diagram of a user equipment 400 in accordance with another embodiment of the present invention. As shown in FIG. 8, the user equipment 400 may include,

A receiving module (410) configured to receive bits transmitted by the first user equipment;

A determination module (420) configured to determine a value of a scrambling code parameter of a first user equipment, the scrambling code parameter including at least one parameter of a common scrambling code parameter and a specific scrambling code parameter; And

And a descrambling module 430 configured to descramble the bits received by the receiving module 410 according to the value of the scrambling code parameter, as determined by the decision module 420.

Thus, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be descrambled in the D2D communication process, and the scrambling code And descrambles the received bits according to the value of the parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

Optionally, if the scrambling code parameter comprises a common scrambling code parameter, the value of the common scrambling code parameter is determined by the first user equipment in accordance with the D2D synchronization signal,

The value of the common scrambling code parameter is determined by the first user equipment in accordance with the primary D2D synchronization channel (PD2DSCH), or

The value of the common scrambling code parameter is the cluster identifier of the D2D cluster to which the first user equipment belongs.

Optionally, in another embodiment, if the scrambling code parameter comprises a specific scrambling code parameter, at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment After the operation is performed using a function preset for the identifier, the value of the specific scrambling code parameter is obtained.

Optionally, in another embodiment, the value of the particular scrambling code parameter is the D2D identifier of the first user equipment,

The value of the particular scrambling code parameter is the D2D group identifier of the first user equipment, or

The value of the particular scrambling code parameter is the service type identifier of the first user equipment.

Optionally, in another embodiment, the function is a hash function or a truncation function.

Optionally, in another embodiment, the determination module 420 includes a first determination unit 421. [

Here, the first determination unit 421 is configured to determine the value of the common scrambling code parameter according to the D2D synchronization signal,

The first determination unit 421 is configured to determine the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH)

The first determination unit 421 is configured to determine the cluster identifier of the D2D cluster to which the user equipment 400 belongs as the value of the common scrambling code parameter.

Alternatively, in another embodiment, the first determination unit 421 is specifically configured to determine the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Alternatively, in another embodiment, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS)

Thus, the first determination unit 421 is specifically configured to determine the value of the common scrambling code parameter according to PD2DSS and SD2DSS.

을 아래의 수식에 따라 결정하도록 구성된다: Alternatively, in another embodiment, the first determination unit 421 may be configured to determine the value of the common scrambling code parameter

In accordance with the following equation: < RTI ID = 0.0 >

는 SD2DSS의 번호이고,

는 PD2DSS의 번호이다. here,

Is the number of the SD2DSS,

Is the number of the PD2DSS.

Optionally, in another embodiment, the decision module 420 may determine,

A receiving unit (422) configured to receive the indication information transmitted by the cluster head of the D2D cluster to which the base station or user equipment (400) belongs, the indication information being used to indicate a value of the scrambling code parameter of the first user equipment; And

And a second determination unit 423 configured to determine the value of the scrambling code parameter according to the instruction information received by the receiving unit 422. [

Optionally, in another embodiment, if the first user equipment scrambles the bits to transmit in the manner of data channel scrambling, the user equipment 400 may also correspondingly descramble the received bits in a data channel descrambling manner And the descrambling module 430,

A third determination unit 431 configured to determine a scrambling code initial value according to the value of the scrambling code parameter, as determined by the decision module 420; And

And a first descrambling unit 432 configured to generate a scrambling code sequence according to the scrambling code initial value determined by the third determination unit 431 and descramble the received bits by using the scrambling code sequence.

Alternatively, in another embodiment, the third determination unit 431 may be,

Determining the value of the common scrambling code parameter as the scrambling code initial value, or

And to determine the value of the specific scrambling code parameter as the scrambling code initial value.

Alternatively, in another embodiment, the third determination unit 431 is configured to determine a scrambling code initial value according to the value of the scrambling code parameter, which is determined by the determination module 420, .

을 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the third decision unit 431 is concretely a scrambling code initial value

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

을 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the third decision unit 431 is concretely a scrambling code initial value

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다.

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Alternatively, in another embodiment, if the first user equipment scrambles the bits to be transmitted in a CRC scrambling manner, the user equipment 400 may also descramble the received bits in a manner of CRC descrambling. Alternatively, the bits received by the receiving module 410 comprise at least two bit segments, each bit segment in at least two bit segments comprising a data bit segment and a CRC bit,

Accordingly, the descrambling module 430,

A segmentation unit (433) configured to divide the value of the scrambling code parameter into at least two scrambling code segments, as determined by the decision module (420); And

A second descrambling unit 434 configured to separately descramble the CRC bits of at least two bit segments by using at least two scrambling code segments divided by the segmentation unit 433 to obtain at least two bit segments to be examined ).

Optionally, in another embodiment, the user equipment 400 may,

A CRC check module configured to perform a CRC check on each bit segment to be examined in at least two bit segments to be checked obtained by the second descrambling unit 434 to obtain a data bit segment of each bit segment to be examined (440); And

And a cascading module (450) configured to cascade data bit segments of at least two of the bit segments to be examined obtained by the CRC checking module (440) to obtain data bits.

Optionally, in another embodiment, the data bits obtained by the cascading module 450 include the original data bits and the CRC bits,

The CRC checking module 440 is further configured to perform a CRC check on the data bits obtained by the cascading module 450 to obtain the original data bits.

The user equipment 400 according to this embodiment of the present invention may correspond to a second user equipment in the D2D communication method according to an embodiment of the present invention and may be configured to perform the aforementioned operations and / And other operations and / or functions are intended to implement the corresponding procedures of the method in Fig. For the sake of brevity, details are not described herein.

Thus, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be descrambled in the D2D communication process, Descrambled bits according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

Figure 9 shows a schematic block diagram of a user equipment 500 in accordance with another embodiment of the present invention. As shown in FIG. 9, the user equipment 500 includes a processor 510 and a transmitter 520.

The processor 510 is configured to determine a value of a scrambling code parameter comprising at least one of a common scrambling code parameter and a specific scrambling code parameter, and to scramble the bits to transmit according to the value of the scrambling code parameter.

Transmitter 520 is configured to transmit scrambled bits to transmit to processor 510.

Therefore, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be scrambled in the D2D communication process, Scrambled according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

It should be understood that in this embodiment of the invention the processor 510 may be a central processing unit (CPU) or the processor 510 may be another general purpose processor, a digital signal processor (DSP) An application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or an independent hardware component. A general purpose processor may be a microprocessor, or the processor may be any conventional processor, or similar.

The user equipment 500 may also include a memory. Here, the memory may include a read-only memory (ROM) and a random access memory (RAM), and provides data and instructions for the processor 510. Some of the memory may further include nonvolatile RAM. For example, the memory may store more information about the device type.

In the implementation process, the steps in the above-described method may be completed by instructions in the form of integrated logic circuitry or software in hardware within the processor 510. [ The steps in the method disclosed with reference to embodiments of the present invention may be performed and completed directly by a hardware processor or may be executed and completed by using a combination of hardware and software modules within the processor. A software module may reside in a mature storage medium in this field, such as RAM, flash memory, ROM, programmable read-only memory, electrically erasable programmable memory, or a register. The storage medium is located in the memory. The processor 510 reads the information from the memory and combines it with the hardware of the processor 510 to complete the steps in the method described above. In order to avoid duplication, details are not described herein.

Optionally, the scrambling code parameter includes a common scrambling code parameter, and thus the processor 510, in particular,

Determines the value of the common scrambling code parameter according to the D2D synchronization signal,

Determine the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH), or

As the value of the common scrambling code parameter, the cluster identifier of the D2D cluster to which the user equipment 500 belongs.

Optionally, in another embodiment, processor 510 is specifically configured to determine the number of D2D synchronization signals as the value of a common scrambling code parameter.

Alternatively, in another embodiment, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS)

Thus, processor 510 is specifically configured to determine the value of a common scrambling code parameter in accordance with PD2DSS and SD2DSS.

은 아래의 수식을 이용하여 결정된다: Optionally, in another embodiment, the value of the common scrambling code parameter

Is determined using the following formula:

는 SD2DSS의 번호이고,

는 PD2DSS의 번호이다. here,

Is the number of the SD2DSS,

Is the number of the PD2DSS.

Optionally, in another embodiment, the scrambling code parameter includes a specific scrambling code parameter, and thus the processor 510 is, in particular,

Is configured to determine the value of a particular scrambling code parameter according to at least one of a D2D identifier of the user equipment (500), a D2D group identifier of the user equipment (500), and a service type identifier (500) of the user equipment.

Optionally, in another embodiment, the processor 510 is, in particular,

The D2D identifier of the user equipment 500 may be determined as the value of a particular scrambling code parameter,

Determine the D2D group identifier of the user equipment 500 as the value of a particular scrambling code parameter, or

And to determine the service type identifier (500) of the user equipment as the value of the specific scrambling code parameter.

Optionally, in another embodiment, the processor 510 is, in particular,

Determining a value of a particular scrambling code parameter according to at least one of a D2D identifier of the user equipment 500, a D2D group identifier of the user equipment 500, or a service type identifier 500 of the user equipment, and a hash function; or

Is configured to determine the value of a particular scrambling code parameter according to at least one of a D2D identifier of the user equipment (500), a D2D group identifier of the user equipment (500), or a service type identifier (500) of the user equipment.

Optionally, in another embodiment, the user equipment 500 may,

 Further comprising a receiver (530) configured to receive indication information used by the base station or the cluster head of the D2D cluster to which the user equipment (500) belongs to indicate a value of a scrambling code parameter,

Thus, the processor 510 is specifically configured to determine the value of the scrambling code parameter in accordance with the indication information received by the receiver 530. [

Optionally, the value of the scrambling code parameter may be specifically the value of the common scrambling code parameter and / or the value of the specific scrambling code parameter.

Optionally, in another embodiment, the processor 510 specifically determines a scrambling code initial value according to the value of the scrambling code parameter, generates a scrambling code sequence according to the scrambling code initial value, and uses the scrambling code sequence And scramble bits to be transmitted.

Optionally, in another embodiment, the processor 510 is, in particular,

Determining the value of the common scrambling code parameter as the scrambling code initial value, or

And to determine the value of the specific scrambling code parameter as the scrambling code initial value.

Optionally, in another embodiment, the processor 510 is specifically configured to determine a scrambling code initial value according to a value of a scrambling code parameter and a current time slot number.

를 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the processor 510 specifically includes a scrambling code initial value < RTI ID = 0.0 >

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

은 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

를 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the processor 510 specifically includes a scrambling code initial value < RTI ID = 0.0 >

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

은 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Optionally, in another embodiment, processor 510 is configured to specifically scramble bits to transmit by dividing the value of the scrambling code parameter into at least two scrambling code segments and using at least two scrambling code segments.

Alternatively, in another embodiment, processor 510 specifically generates a cyclic redundancy check (CRC) bit of a bit to be transmitted and uses the bit to be transmitted and the CRC bit of the bit to be transmitted as a bit to be scrambled, Bits into at least two scrambled bit segments, generating the CRC bits of each scrambled bit segment in at least two scrambled bit segments, and using at least two scrambling code segments to generate at least two scrambled bit segments Lt; RTI ID = 0.0 > CRC < / RTI >

Alternatively, in another embodiment, the processor 510 may be configured to divide the bits to be transmitted into at least two bit segments to be transmitted, and generate the CRC bits of each bit segment to be transmitted in at least two bit segments to be transmitted And is configured to individually scramble the CRC bits of at least two bit segments to be transmitted by using at least two scrambling code segments.

The user equipment 500 according to this embodiment of the present invention may correspond to a first user equipment in a D2D communication method according to an embodiment of the present invention and may perform the above described operations and / And other operations and / or functions are intended to implement the corresponding procedures of the method in Figs. 1-5. For the sake of brevity, details are not described herein.

Therefore, the user equipment according to this embodiment of the present invention determines the value of at least one of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be scrambled in the D2D communication process, Scrambled according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

10 is a schematic block diagram of a user equipment 600 in accordance with another embodiment of the present invention. 10, the user equipment 600 may be configured to receive,

A receiver configured to receive bits transmitted by the first user equipment; And

To determine the value of the scrambling code parameter of the first user equipment, including at least one of a common scrambling code parameter and a specific scrambling code parameter, and to descramble the bits received by the receiver 610 according to the value of the scrambling code parameter And configured processor 620.

The user equipment according to this embodiment of the invention thus determines the value of at least one scrambling code parameter of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be descrambled in the D2D communication process, Descrambled bits according to the value of the scrambling code parameter, thereby improving the feasibility of the communication scheme and improving the user experience.

It should be understood that in this embodiment of the invention the processor 610 may be a central processing unit or the processor 610 may be another general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC) A programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or an independent hardware component. A general purpose processor may be a microprocessor, or the processor may be any conventional processor, or similar.

Optionally, the user equipment 600 may further comprise a memory. Here, the memory includes ROM and RAM, and provides instructions for data and processor 620. Some of the memory may further include non-volatile RAM. For example, the memory may store more information about the device type.

In the implementation process, the steps in the above-described method may be completed by instructions in the form of integrated logic circuitry or software in hardware at processor 620. [ The steps in the method disclosed with reference to embodiments of the present invention may be performed and completed directly by a hardware processor or may be executed and completed by using a combination of hardware and software modules within the processor. A software module may reside within a mature storage medium in the art, such as RAM, flash memory, ROM, programmable read-only memory, electrically erasable programmable ROM, or a register. The storage medium is located in the memory. Reads the information in the processor 620 memory and combines it with the hardware of the processor 620 to complete the steps in the method described above. In order to avoid duplication, details are not described herein.

Optionally, if the scrambling code parameter comprises a common scrambling code parameter, the value of the common scrambling code parameter is determined by the first user equipment in accordance with the D2D synchronization signal,

The value of the common scrambling code parameter is determined by the first user equipment in accordance with the primary D2D synchronization channel (PD2DSCH), or

The value of the common scrambling code parameter is the cluster identifier of the D2D cluster to which the first user equipment belongs.

Optionally, in another embodiment, if the scrambling code parameter comprises a specific scrambling code parameter, at least one of the D2D identifier of the first user equipment, the D2D group identifier of the first user equipment, and the service type identifier of the first user equipment After the operation is performed using a function preset for the identifier, the value of the specific scrambling code parameter is obtained.

Optionally, in another embodiment, the value of the particular scrambling code parameter is the D2D identifier of the first user equipment,

The value of the particular scrambling code parameter is the D2D group identifier of the first user equipment, or

The value of the particular scrambling code parameter is the service type identifier of the first user equipment.

Optionally, in another embodiment, the function is a hash function or a truncation function.

Optionally, in another embodiment, the processor 620 is, in particular,

Determines the value of the common scrambling code parameter according to the D2D synchronization signal,

Determine the value of the common scrambling code parameter according to the primary D2D synchronization channel (PD2DSCH), or

As the value of the common scrambling code parameter, the cluster identifier of the D2D cluster to which the user equipment 600 belongs.

Optionally, in another embodiment, the processor 620 is specifically configured to determine the number of the D2D synchronization signal as the value of the common scrambling code parameter.

Alternatively, in another embodiment, the D2D synchronization signal comprises a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS)

Thus, the processor 620 is specifically configured to determine the value of the common scrambling code parameter in accordance with PD2DSS and SD2DSS.

을 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the processor 620 may be configured to compare the value of the common scrambling code parameter

In accordance with the following equation: < RTI ID = 0.0 >

는 SD2DSS의 번호이고,

는 PD2DSS의 번호이다. here,

Is the number of the SD2DSS,

Is the number of the PD2DSS.

Optionally, in another embodiment, the receiver 610 may additionally include a base station or user equipment 600, which is used by the cluster head of the D2D cluster to which the base station or user equipment 600 belongs, used to indicate the value of the scrambling code parameter of the first user equipment And is configured to receive instruction information,

The processor 620 is further configured to determine the value of the scrambling code parameter according to the indication information received by the receiver 610

Optionally, in another embodiment, if the first user equipment scrambles the bits to transmit in the manner of data channel scrambling, the user equipment 600 also correspondingly descrambles the received bits in a data channel descrambling manner. The processor 620 is specifically configured to determine a scrambling code initial value according to the value of the scrambling code parameter, to generate a scrambling code sequence according to the scrambling code initial value, and to descramble the received bits using the scrambling code sequence do.

Optionally, in another embodiment, the processor 620 is, in particular,

Determining the value of the common scrambling code parameter as the scrambling code initial value, or

And to determine the value of the specific scrambling code parameter as the scrambling code initial value.

Optionally, in another embodiment, the processor 620 is specifically configured to determine a scrambling code initial value according to the value of the scrambling code parameter and the current time slot number.

을 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the processor 620 specifically includes a scrambling code initial value < RTI ID = 0.0 >

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이거나 또는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of a common scrambling code parameter or the value of a particular scrambling code parameter.

을 아래의 수식에 따라 결정하도록 구성된다: Optionally, in another embodiment, the processor 620 specifically includes a scrambling code initial value < RTI ID = 0.0 >

In accordance with the following equation: < RTI ID = 0.0 >

, 또는

, or

는 현재 타임슬롯 번호이고,

는 공통 스크램블링 코드 파라미터의 값이며,

는 특정 스크램블링 코드 파라미터의 값이다. here,

Is the current time slot number,

Is the value of the common scrambling code parameter,

Is the value of a particular scrambling code parameter.

Optionally, in another embodiment, if the first user equipment scrambles the bits to transmit in a CRC scrambling manner, the user equipment 600 may also descramble the received bits in the manner of CRC descrambling. Alternatively, the bits received by receiver 610 comprise at least two bit segments, each bit segment in at least two bit segments comprising a data bit segment and a CRC bit,

Thus, processor 620 is specifically configured to divide the value of the scrambling code parameter into at least two scrambling code segments and to independently descramble the CRC bits of at least two bit segments by using at least two scrambling code segments. To obtain at least two bit segments to be examined.

Optionally, in another embodiment, the processor 620 additionally performs a CRC check on each bit segment to be examined in at least two obtained bit segments to be examined to obtain a data bit segment of each bit segment to be examined And to cascade data bit segments of at least two bit segments to be examined to obtain data bits.

Optionally, in another embodiment, the data bits obtained by the processor 620 include the original data bits and the CRC bits,

The processor 620 is further configured to perform a CRC check on the data bits to obtain the original data bits.

The user equipment 600 according to this embodiment of the present invention may correspond to a second user equipment in the D2D communication method according to an embodiment of the present invention and may perform the aforementioned operations and / And other operations and / or functions are intended to implement the corresponding procedure of the method in Fig. For the sake of brevity, details are not described herein.

Thus, the user equipment according to this embodiment of the present invention determines the value of at least one scrambling code parameter of the common scrambling code parameter or the specific scrambling code parameter so that the transmission information can be descrambled in the D2D communication process, The bits are descrambled according to the value of the scrambling code parameter, thereby increasing the feasibility of the communication scheme and improving the user experience.

It should be understood that the term " and / or " in the embodiment of the present invention describes only the association to describe the associated object and that there can be three relationships. For example, A and / or B may represent three cases when only A exists, when A and B are present, and only B exists. Also, the letter " / " in this specification generally refers to the " or " relationship between the associated objects.

Those skilled in the art will recognize that steps and units may be implemented by electronic hardware, computer software, or a combination thereof, in conjunction with the methods described in the embodiments disclosed herein. In order to clearly illustrate the compatibility between hardware and software, the configuration and steps of each implementation according to the function have been described generally. Whether the function is performed by hardware or software depends on the design constraints of the particular application and technical solution. Those skilled in the art will recognize that other implementations may be used to implement the described functionality for each particular application, but such implementation should not be considered to be outside the scope of the present invention.

For convenience and brief description, for the detailed operating process of the system, device, and unit described above, the corresponding process in the method embodiment described above may be referred to and details are not described herein .

It should be understood that in some implementations included in the present application, the disclosed systems, devices, and methods may be implemented in other ways. For example, the described apparatus embodiments are merely illustrative. For example, unit partitioning is only logical functional partitioning and can be a different partition in an actual implementation. For example, multiple units or components may be combined or integrated into different systems, or some features may be omitted or not performed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be implemented through several interfaces. Indirect or communication links between devices or units may be implemented in electronic form, in mechanical form, or in other forms.

A unit described as a separate part may or may not be physically separated, and a part indicated as a unit may or may not be a physical unit, may be placed in one position, or may be distributed on a plurality of network units. One part of the unit or the whole unit may be selected according to the practical need to achieve the goal of the solution of the embodiment of the present invention.

Further, the functional units of the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically alone, or at least two units may be integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software functional unit.

When an integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on this understanding, essentially all or part of the technical solutions of the present invention, or portions contributing to the prior art, or technical solutions may be implemented in the form of software products. The software product is stored in a storage medium and includes some instructions for directing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present invention do. The above-mentioned storage medium may be any storage medium capable of storing program codes such as a USB flash drive, a removable hard disk, a ROM, a Random Access Memory (RAM), a magnetic disk, Optical disc.

The foregoing description is only a specific implementation of the present invention and is not intended to limit the scope of protection of the present invention. Any alteration or substitution that can be readily ascertained by those skilled in the art within the technical scope of the present invention will fall within the scope of the present invention. Accordingly, the scope of protection of the present invention is dependent on the scope of protection of the claims.

Claims (70)

A device-to-device (D2D) communication method comprising:
The method comprising the steps of: a first user equipment determining a value of a scrambling code parameter, the scrambling code parameter comprising a specific scrambling code parameter;
Scrambling bits to transmit according to a value of the scrambling code parameter; And
Wherein the first user equipment transmits a scrambled transmit bit
Lt; / RTI >
Wherein the step of the first user equipment determining a value of a scrambling code parameter comprises:
The first user equipment determining a value of the specific scrambling code parameter according to a D2D group identifier and a truncate function of the first user equipment,
Wherein the cutting function is used to cut the identifier from the back end to the front end. The method according to claim 1,
Wherein scrambling bits to transmit according to the value of the scrambling code parameter comprises:
The first user equipment determining an initial value of a scrambling code according to the value of the scrambling code parameter; And
Wherein the first user equipment generates a scrambling code sequence in accordance with the scrambling code initial value and scrambles the bits to be transmitted using the scrambling code sequence. 3. The method of claim 2,
Wherein the step of the first user equipment determining a scrambling code initial value according to a value of the scrambling code parameter comprises:
And the first user equipment determining the value of the specific scrambling code parameter as the scrambling code initial value. A device-to-device (D2D) communication method comprising:
Receiving a bit transmitted by the second user equipment by the first user equipment;
The second user equipment determining a value of a scrambling code parameter of the first user equipment, wherein the scrambling code parameter comprises a specific scrambling code parameter; And
The second user equipment descrambles the received bits according to the value of the scrambling code parameter
Lt; / RTI >
After the operation is performed using a function predetermined for the D2D group identifier of the first user equipment, the value of the specific scrambling code parameter is obtained,
Wherein the predetermined function is a cutting function,
Wherein the cutting function is used to cut the identifier from the back end to the front end. 5. The method of claim 4,
Wherein the second user equipment descrambles the received bits according to the value of the scrambling code parameter,
The second user equipment determining a scrambling code initial value according to the value of the scrambling code parameter, and
The second user equipment generating a scrambling code sequence according to the scrambling code initial value and descrambling the received bits using the scrambling code sequence. 6. The method of claim 5,
Wherein the step of the second user equipment determining a scrambling code initial value according to a value of the scrambling code parameter comprises:
And the second user equipment determining the value of the specific scrambling code parameter as the scrambling code initial value. As a user equipment,
A determination module configured to determine a value of a scrambling code parameter, the scrambling code parameter including a specific scrambling code parameter;
A scrambling module configured to scramble bits to transmit according to the value of the scrambling code parameter, as determined by the decision module; And
A transmission module configured to transmit a scrambled bit to be transmitted by the scrambling module;
/ RTI >
The determination module includes:
And to determine a value of the specific scrambling code parameter according to a D2D group identifier and a truncation function of the user equipment,
Wherein the cutting function is used to cut the identifier from the back end to the front end. 8. The method of claim 7,
The scrambling module includes:
A determination unit configured to determine a scrambling code initial value according to a value of the scrambling code parameter; And
A first scrambling unit configured to generate a scrambling code sequence according to the scrambling code initial value determined by the determining unit and to scramble the bit to be transmitted using the scrambling code sequence. 9. The method of claim 8,
Specifically,
And to determine the value of the specific scrambling code parameter as the scrambling code initial value. As a user equipment,
A receiving module configured to receive a bit transmitted by a first user equipment;
A determination module configured to determine a value of a scrambling code parameter of the first user equipment, the scrambling code parameter including a specific scrambling code parameter; And
A descrambling module configured to descramble bits received by the receiving module according to a value of the scrambling code parameter,
/ RTI >
After the operation is performed using a function predetermined for the D2D group identifier of the first user equipment, the value of the specific scrambling code parameter is obtained,
Wherein the predetermined function is a cutting function,
Wherein the cutting function is used to cut the identifier from the back end to the front end. 11. The method of claim 10,
Wherein the descrambling module comprises:
A third determination unit configured to determine a scrambling code initial value according to a value of the scrambling code parameter; And
A first descrambling unit configured to generate a scrambling code sequence according to the scrambling code initial value determined by the third determination unit and to descramble the received bits using the scrambling code sequence. 12. The method of claim 11,
The third determination unit is, specifically,
And to determine the value of the specific scrambling code parameter as the scrambling code initial value. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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